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Old 12-13-2013, 06:00 AM   #1
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Air system bleeding off?

Yesterday I noticed that standing by the pass front wheel I air bleeding off then nothing, then again.

Never had an air coach so all new to me.

Is this normal?

Or do I have a leak?

I show 130psi running.
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Old 12-13-2013, 06:09 AM   #2
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It is normal. As I was told by freightliner it is the system just doing its level thing.
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Old 12-13-2013, 02:18 PM   #3
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My rig will self correct the air leveling for the first 24 hours of parking. Then it seems to lock in and make no more adjustments.

It has done the same thing for the past 12 years, so I assume it is normal.
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Old 12-13-2013, 05:39 PM   #4
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Quote:
Originally Posted by jimbo2013 View Post
Yesterday I noticed that standing by the pass front wheel I air bleeding off then nothing, then again.

Never had an air coach so all new to me.

Is this normal?

Or do I have a leak?

I show 130psi running.
Do you have air leveling or do you have leveling jacks (feet) that drop down to level. If it is air leveling then yes it will want to level itself but if you have the leveling jacks you may have a problem. You should show 120-130psi with the motor running on both tanks but what is it after it sets for a few hours.
I have air leveling and in warm weather it is leveling itself all the time.
Have you changed out the air dryer and need to drain the tanks after a long run to remove and water in the system.
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Old 12-13-2013, 07:19 PM   #5
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Quote:
Originally Posted by jimbo2013 View Post
Yesterday I noticed that standing by the pass front wheel I air bleeding off then nothing, then again.

Never had an air coach so all new to me.

Is this normal?

Or do I have a leak?

I show 130psi running.
I think it's normal. If you rock the coach (or the wind rocks the coach) and the air bags are still inflated, the ride height valves will adjust the air, either adding more air or bleeding some air out of the air bag as required.

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Old 12-13-2013, 07:32 PM   #6
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Jimbo, Fred's description, is exactly the way my coach operates . The air leveling will react , when I step of the stairs to ground and if the wind is rocking the coach , the air leveling will continue to react until, the air brake min pressure valve cuts off replacement air to the suspension from the tanks; to maintain braking if an air bag should rupture. ( 65psi if memory serves )
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Old 12-13-2013, 09:06 PM   #7
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thanks for the feedback
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Old 12-14-2013, 09:30 AM   #8
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I doubt is a 2000 Endeavor has air leveling - hydraulic leveling is standard on that year & model.

If the coach is just sitting there (as I hope, since you were walking by it!), I think it would be very unusual for the air to bleed off in spurts like that. The air suspension does have ride height valves that attempt to keep the body at a constant height above the frame (which is not the same as "level") and will add or remove air from each air bag to do that. But that should have happened by the time you got out of the coach to walk around. If you are still hearing it a few minutes later, something is awry. My guess is that you have an air leak and the coach air system is trying to replenish the lost air pressure. That will continue until the air tank (reservoir) runs out of air pressure to do it. After that, the corner with the leak will slowly sag down.

So the bottom line is that the air system is doing what it is supposed to do, but it should not need to be doing that when you are parked and the coach is stable. But this is a very minor thing, and when the engine is running your compressor supplies more than enough air to keep the suspension fully up. You can get the leak fixed at your leisure, either DIY, at a truck suspension shop, or a Freightliner service center..
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Old 12-14-2013, 10:15 AM   #9
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My mistake , describing the air suspension ride height as air leveling, Gary.
jimbo, sorry if my mistake caused any confusion.
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Old 12-15-2013, 04:47 AM   #10
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Quote:
Originally Posted by Gary RVRoamer View Post
I doubt is a 2000 Endeavor has air leveling - hydraulic leveling is standard on that year & model.

If the coach is just sitting there (as I hope, since you were walking by it!), I think it would be very unusual for the air to bleed off in spurts like that. The air suspension does have ride height valves that attempt to keep the body at a constant height above the frame (which is not the same as "level") and will add or remove air from each air bag to do that. But that should have happened by the time you got out of the coach to walk around. If you are still hearing it a few minutes later, something is awry. My guess is that you have an air leak and the coach air system is trying to replenish the lost air pressure. That will continue until the air tank (reservoir) runs out of air pressure to do it. After that, the corner with the leak will slowly sag down.

So the bottom line is that the air system is doing what it is supposed to do, but it should not need to be doing that when you are parked and the coach is stable. But this is a very minor thing, and when the engine is running your compressor supplies more than enough air to keep the suspension fully up. You can get the leak fixed at your leisure, either DIY, at a truck suspension shop, or a Freightliner service center..
It is normal. According to freightliner it is the air system is adjusting the air ride. It will do it even while sitting and you are moving around in it. I was going to replace my ride height sensors in the front because I thought I also had a leak but was told that is how the system works, It will stop at 60 lbs in the air system,

To the OP call freightliner and ask the question. They will give the same answer they gave me and see for yourself.
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